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Electrical & Civil EPC

Power Substation Installation

Turnkey 33/11 kV substations up to 2×5 MVA — design, supply, erection, testing and commissioning, including all associated civil works.

Voltage range11 kV – 220 kV

Ranisons has delivered 33/11 kV power substations on a complete turnkey basis — taking a project from detailed engineering through to charging under utility supervision, with the associated civil works carried out in the same contract.

Our largest substation package to date was the 33/11 kV, 2×5 MVA substation at Jharkhand Mega Food Park, Getalsud, executed against work order JMFPPL/ELE/0413/02 at a contract value of ₹473 lakh, together with a separate ₹90 lakh package for the substation civil works.

Beyond greenfield installation, we have carried out shutdown-dependent rehabilitation work — including the health assessment and overhaul of two 16 MVA, 132/6.6 kV transformers for BCCL Dhanbad, and the replacement of protective relays in a live 220/132 kV substation.

Method

How we deliver

  1. 01

    Design & detailed engineering

    Single-line diagrams, layout and foundation drawings, protection philosophy and bill of quantities, submitted for utility approval.

  2. 02

    Procurement & supply

    Transformers, switchgear, structures, conductors and protection equipment sourced from approved and CPRI-tested manufacturers.

  3. 03

    Civil works

    Control room building, equipment foundations, cable trenches, boundary wall and yard levelling.

  4. 04

    Erection

    Structure fabrication and erection, transformer placement, switchgear and busbar installation, earthing grid and cabling.

  5. 05

    Testing & commissioning

    Pre-commissioning checks, relay setting and coordination, insulation and protection testing, charging under utility supervision.

  6. 06

    Handover

    As-built drawings, test reports, O&M manuals and defect-liability support.

Questions

Frequently asked

What substation capacities can Ranisons execute?

We have executed 33/11 kV substations up to 2×5 MVA on a turnkey basis, and have worked on systems from 415 V up to 220 kV including 220/132/33 kV grid substations.

Do you carry out the civil works as well?

Yes. We are registered for both electrical and civil construction, so control-room buildings, foundations and yard works are delivered in the same contract rather than subcontracted.

Are you licensed to work for Jharkhand utilities?

Yes. We hold Electrical Contractor's Licence JH/EC/1003 issued by the Government of Jharkhand and have executed work for JBVNL, JUSNL and JSEB.

On site

Material to site, steel and terminations up, transformer set and connected, switchgear room fitted out. From the client’s own site files; no contract reference is claimed for these. Select any one to enlarge it.

  • Two large yellow cable drums standing in grass beside a newly built substation building

    Cable drums delivered to site, alongside the substation building.

  • A row of cable drums laid on their sides at the edge of a site, part-run-out

    Drums part-run-out as the cable is pulled in.

  • Steel HT gantry structure standing against an overcast sky above a boundary wall

    HT gantry standing, before the drops are made off.

  • Overhead conductors terminated onto a steel gantry through strain insulators

    Conductors terminated onto the gantry through strain insulators.

  • Close view of drop conductors running down a gantry leg to equipment below

    Drops taken down the gantry leg to the equipment below.

  • Oil-filled distribution transformer set on a concrete plinth inside a walled bay

    Transformer set on its plinth inside the bay, cable trench open.

  • Transformer in its bay seen from the yard, with the boundary fence behind

    The bay seen from the yard side.

  • Transformer with conservator tank and Buchholz relay visible above the tank

    Conservator and Buchholz relay above the tank.

  • HV bushings and cable terminations on the side of an installed transformer

    HV bushings made off and terminated.

  • Radiator cooling bank on the side of an oil-filled transformer

    Radiator bank, with the marshalling box alongside.

  • Detail of transformer radiators and tank against a substation wall

    Radiators and tank against the bay wall.

  • Ranisons crew member standing beside an installed transformer, giving a sense of its height

    The unit at working scale.

  • Three Ranisons crew members at the wall of a transformer bay during installation

    Crew at the bay wall during installation.

  • Ranisons engineer checking connections at the base of an installed transformer

    Connections checked at the base of the unit.

  • Two Ranisons crew members walking into a fenced substation compound

    Entering the compound; the fenced yard behind.

  • Switchgear panels still in timber crates standing in a finished panel room

    Panels delivered and still crated in the finished room.

  • Panel room with switchgear installed along one wall and crates on the floor

    Room fitted out along one wall while the rest is still crated.

  • Long panel room with switchgear cubicles being installed down both walls

    Cubicles going in down both walls.

  • Rows of switchgear cubicles installed on both sides of a panel room

    Both rows set and lined up.

  • LT switchgear panels installed in a finished room with cable trench covers down

    LT panels installed, trench covers down.

  • Completed switchgear line-up with orange and grey cubicles, instruments fitted

    Completed line-up, instruments and relays fitted.

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